private static byte[] serializeTxArgs(TxArgs txArgs)
{
byte[] result = new byte[] { };
result = WriteVarBytes(txArgs.toAddress, result);
result = WriteUint64(txArgs.amount, result);
return(result);
}
public static bool LockAsset(byte[] fromAddress, byte[] toUserAddress, BigInteger amount, BigInteger toChainId)
{
bool success = false;
byte[] txData = new byte[] { };
byte[] AssetHash = GetAssetHash(toChainId);
byte[] redeemScript = GetRedeemScript();
TxArgs txArgs = new TxArgs
{
toAddress = toUserAddress,
amount = amount
};
if (toChainId == 1)
{
if (amount < 2000)
{
Runtime.Notify("btcx amount should be greater than 2000");
return(false);
}
else
{
txData = serializeToBtcTxArgs(txArgs, redeemScript);
}
}
else
{
txData = serializeTxArgs(txArgs);
}
//call transfer method
success = Transfer(fromAddress, ExecutionEngine.ExecutingScriptHash, amount, new byte[] { });
if (!success)
{
Runtime.Notify("failed to transfer");
return(success);
}
//call CCMC cross chain method
var param = new object[] { toChainId, AssetHash, "unlock", txData };
var ccmc = (DyncCall)CCMCScriptHash.ToDelegate();
success = (bool)ccmc("CrossChain", param);
if (!success)
{
Runtime.Notify("failed to call CCMC");
Transfer(ExecutionEngine.ExecutingScriptHash, fromAddress, amount, ExecutionEngine.ExecutingScriptHash);
}
else
{
Lock(ExecutionEngine.ExecutingScriptHash, fromAddress, toChainId, redeemScript, toUserAddress, amount);
}
return(success);
}
private static TxArgs deserializeTxArgs(byte[] source)
{
TxArgs txArgs = new TxArgs();
int offset = 0;
var Temp = ReadVarBytes(source, offset);
txArgs.toAddress = (byte[])Temp[0];
offset = (int)Temp[1];
txArgs.amount = ReadUint64(source, offset);
offset += 8;
return(txArgs);
}
public static bool UnlockAsset(byte[] argsBytes, byte[] fromContractAddress, BigInteger fromChainId, byte[] caller)
{
bool success = false;
if (!caller.Equals(CCMCScriptHash))
{
Runtime.Notify("Only allowed to be called by CCMC");
return(false);
}
byte[] AssetHash = GetAssetHash(fromChainId);
if (!fromContractAddress.Equals(AssetHash))
{
Runtime.Notify(AssetHash);
Runtime.Notify(fromContractAddress);
Runtime.Notify("fromContractAddress not correct");
return(false);
}
TxArgs txArgs = new TxArgs();
txArgs = deserializeTxArgs(argsBytes);
if (txArgs.amount < 0)
{
Runtime.Notify("ToChain Amount SHOULD not be less than 0.");
return(false);
}
//transfer asset to toAddress
success = Transfer(ExecutionEngine.ExecutingScriptHash, txArgs.toAddress, txArgs.amount, ExecutionEngine.ExecutingScriptHash);
if (!success)
{
Runtime.Notify("Failed to transfer NEP5 token to toAddress.");
}
else
{
Unlock(ExecutionEngine.ExecutingScriptHash, txArgs.toAddress, txArgs.amount);
}
return(success);
}
